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A308863 as a simple table

na(n)
01
11
26
357
4736
511985
6235296
75403937
8142073856
94206560769
10138483596800
115017244970441
12198363105460224
138498001799768273
14392127481640165376
1519388814120804416625
161022681739669784231936
1757317273018414456262273
183401527253966521309200384

[1,1,6,57,736,11985,235296,5403937,142073856,
 4206560769,138483596800,5017244970441,
 198363105460224,8498001799768273,
 392127481640165376,19388814120804416625,
 1022681739669784231936,57317273018414456262273,
 3401527253966521309200384]